package com.design.pattern.observer.gper;import java.util.Observable;import java.util.Observer;/** * create by yufeng on 2021/7/5 20:18 */public class Teacher implements Observer {    private String name;    public Teacher(String name) {        this.name = name;    }    public void update(Observable o, Object arg) {        GPer gper = (GPer)o;        Question question = (Question)arg;        System.out.println("======================");        System.out.println(name + "老师，你好！\n" +                        "您收到了一个来自" + gper.getName() + "的提问，希望您解答。问题内容如下：\n" +                        question.getContent() + "\n" +                        "提问者：" + question.getUserName());    }}